I realized I missed posting in April entirely(!), and I don’t like the look of the gap in the archive calendar, so I’m back-dating this entry.
And you need to check this out, a Flash-animated Scale of the Universe that is simply mind-boggling. From the smallest structures known (quantum foam, the Planck length) to the largest (the size of the observable universe), that you can zoom in and out on, and it’s all to scale (relative to the zoom level). The coolest thing I’ve seen online lately.